V3.3 Release Candidate 3

Hopefully the last one before we release

The bugs related to file processing warrant a quick round of testing.

Fixes since last release candidate:
1fa9db2 Fix 3DP file import 'hang'
5192d6f Joule GPS+ has a longer response in Get Unit Software Version
7d5b6a8 Fixes TcxParser for HRM Swim files
7cf63b4 TrainSidebar: Delete multiple workouts
dbe5632 Monark: Bail early if we can't open serial port
490af93 Fixes Device Type identification for FIT lap swimming files
7886b5e Remove a couple of unused variables.
e74e8fc Fixes Lap Swimming import for Garmin Swim drill mode
c902647 Monark: Improve stability of model detection
07e74f7 If the duration spent is 0, we should display 0, not NaN.
e7cc1f0 Formulas config(cranklength)
d0b155c Fix FTP/CP view update
154a46b AllPlot refresh on Units changed
1613f03 fix ANT device reset requence
e476c5d add bounding box to meters widget overlays
40a061e Monark: Add support for controlling power on LCx models
d73a55e SML Lap Swimming support samples